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Why can't C compilers rearrange struct members to eliminate alignment padding? [duplicate]
...sents the memory structure of objects beyond the current compilation unit (for example: a foreign library, a file on disc, network data, CPU page tables, ...). In such a case the binary structure of data is also defined in a place inaccessible to the compiler, so reordering the struct fields would c...
In Scala, what exactly does 'val a: A = _' (underscore) mean?
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val a: A = _ is a compile error. For example:
scala> val a: String = _
<console>:1: error: unbound placeholder parameter
val a: String = _
^
What does work is var a: A = _ (note var instead of val). As Chuck says in ...
How do I write unit tests in PHP? [closed]
I've read everywhere about how great they are, but for some reason I can't seem to figure out how exactly I'm supposed to test something. Could someone perhaps post a piece of example code and how they would test it? If it's not too much trouble :)
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Is there a built-in function to print all the current properties and values of an object?
So what I'm looking for here is something like PHP's print_r function.
25 Answers
25...
How to tell if a tag failed to load
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There is no error event for the script tag. You can tell when it is successful, and assume that it has not loaded after a timeout:
<script type="text/javascript" onload="loaded=1" src="....js"></script>
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SQLAlchemy IN clause
...conn.execute(s, id_list=tuple(id_list)).fetchall()
Hope everything works for you.
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Scala: What is a TypeTag and how do I use it?
All I know about TypeTags is that they somehow replaced Manifests. Information on the Internet is scarce and doesn't provide me with a good sense of the subject.
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UIRefreshControl without UITableViewController
...oc] init];
[refreshControl addTarget:self action:@selector(handleRefresh:) forControlEvents:UIControlEventValueChanged];
[self.myTableView addSubview:refreshControl];
This adds a UIRefreshControl above your table view and works as expected without having to use a UITableViewController :)
EDIT: ...
Remove not alphanumeric characters from string
... underscores use e.g.:
input.replace(/[^0-9a-z]/gi, '')
The input is malformed
Since the test string contains various escaped chars, which are not alphanumeric, it will remove them.
A backslash in the string needs escaping if it's to be taken literally:
"\\test\\red\\bob\\fred\\new".replace(/\...
Create singleton using GCD's dispatch_once in Objective-C
...the low-level details can give you insights into powerful new ways to transform Objective-C.
Refer here: instancetype
+ (instancetype)sharedInstance
{
static dispatch_once_t once;
static id sharedInstance;
dispatch_once(&once, ^
{
sharedInstance = [self new];
}); ...